Marquell sits next to 3 phonetic neighbors — Marcel, Marquise, and Marcellus are the closest matches by sound. Most share Marquell's Roman/Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"elm tree grove"
"spear ruler, spear power"
"liberated (spiritual parallel to Nirvana)"
"narrow strait, channel"
"my God is Yahweh"
"supplanter, one who follows closely"
"meadow clearing"
"small victorious one"
"God is my strength, helped by God"
"great one"
"friend, companion"
"revered king"
"charcoal hill"
"God is gracious"
"flat-bladed digging tool"
"God is gracious (via Zane/John)"
"modern American creation"
"crowned with laurel, victorious"
"bright town"
"valley of Wendel"
Similar sound: These names share phonetic patterns with Marquell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Roman/Latin origins, giving them the same cultural heritage as Marquell.
Rhythm: Marquell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.